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  <title>Document</title>
  <script>
    // reverse 翻转
    function reverse (arr) {
      var newArr = [];
      for (var i = arr.length - 1; i >= 0; i--) {
        newArr[newArr.length] = arr[i];
      }
      return newArr;
    }
    var arr1 = reverse([5, 2, 6, 7, 2, 4]);
    console.log(arr1);
    var arr2 = reverse(['pink', 'blue', 'skyblue']);
    console.log(arr2);
  </script>
</head>

<body>

</body>

</html>